<template>
<transition name="move">
<div class="food" v-show="showFlag" ref="food">
     <div class="food-content">
        <div class="image-header">
            <img :src="food.image" >
            <div class="back" @click="hide">
                <i class="icon-close"></i>
            </div>
        </div>
        <div class="content">
            <h1 class="title">{{food.name}}</h1>
            <div class="detail">
                <span class="sell-count">月售{{food.sellCount}}份</span>
                <span class="rating">好评率{{food.rating}}%</span>
            </div>
            <div class="price">
                <span class="now">￥{{food.price}}</span><span
            class="old" v-show="food.oldPrice">￥{{food.oldPrice}}</span>
            </div>
            <div class="cartcontrol-wrapper">
                <cartcontrol  :food="food" @increment="increment"></cartcontrol>
            </div>
            <transition name="fade">
                <div @click.stop.prevent="addFirst($event)"
                     class="buy"
                     v-show="!food.count || food.count===0"
                >
                    加入购物车
                </div>
            </transition>    
        </div>
        <!-- 有信息时有边框 -->
        <split v-show="food.info"></split>
        <div class="info" v-show="food.info">
            <h1 class="title">商品信息</h1>
            <p class="text">{{food.info}}</p>
        </div>
        <split></split>
        <div class="rating">
            <h1 class="title">商品评价</h1>
            <ratingselect :select-type="selectType"  
                           :only-content="onlyContent" 
                           :desc="desc"
                           :ratings="food.ratings"
                           @select="selectRating"
                           @toggle="toggleContent"
                           >               
            </ratingselect>
            <div class="rating-wrapper">
                <ul v-show="food.ratings && food.ratings.length">
                    <!-- v-show也可以绑定表达式，函数的返回一个计算结果 -->
                    <li v-for="rating in food.ratings" 
                         class="rating-item border-1px"
                         v-show="needShow(rating.rateType,rating.text)"
                    >  
                        <div class="user">
                            <span class="name">{{rating.username}}</span>
                            <img :src="rating.avatar" class="avatar" width="12" height="12">
                        </div>  
                        <div class="time">{{rating.rateTime | formatDate}}</div>
                        <p class="text">
                            <span :class="{'icon-thumb_up':rating.rateType===0,
                            'icon-thumb_down':rating.rateType===1}"></span>
                            {{rating.text}}
                        </p>              
                    </li>
                </ul>
                <div class="on-rating" v-show="!food.ratings || !food.ratings.length">暂无评价</div>
            </div>
        </div>

    </div>
</div> 
</transition>  
</template>
<script>
import Vue from 'vue';
import BScroll from 'better-scroll';
// 带{}因为date是export而不是export default他可以导出多个模块
// 如import {formatDate,a} from '../../common/js/date';
import {formatDate} from '../../common/js/date';
import cartcontrol from "../cartcontrol/cartcontrol.vue"
import split from "../split/split.vue"
import ratingselect from "../ratingselect/ratingselect"
  const ALL = 2;
export default {
  name: 'food',
  props:{
  	food:Object
  },
  components: {
  	cartcontrol,
    split,
    ratingselect
  },
  data() {
  	return {
  	  showFlag: false,
      selectType: ALL,
      onlyContent: true,
      desc: {
          all: '全部',
          positive: '推荐',
          negative: '吐槽'
      }
  	}
  },
  methods:{
    show() {
        this.showFlag = true;
        this.selectType = ALL;//组件可能被多次使用，要保持初始状态
        this.onlyContent = false;
        this.$nextTick(() => {
            if (!this.scroll) {
                this.scroll = new BScroll(this.$refs.food, {
                  click: true
                });
            } else {
                this.scroll.refresh();
            }
        });
    },
    hide() {
        this.showFlag = false;
    },
    addFirst(event) {
        if (!event._constructed) {
          return;
        }
        this.$emit('add', event.target);
        Vue.set(this.food, 'count', 1);
    },
    increment(target){
        this.$emit('add', target);
    },
    selectRating(type){
        this.selectType = type;
        this.$nextTick(() => {
          this.scroll.refresh();
        });
    },
    toggleContent(type){
        this.onlyContent = type;
        this.$nextTick(() => {
          this.scroll.refresh();
        });
    },
    needShow(type,text){//实现tab的内容切换
    if (this.onlyContent && !text) {
          // 只看内容和内容为空时
          return false;
        }
        if (this.selectType === ALL) {
          // 遍历：有内容时显示内容
          return true;
        }else {//判断当前的类型与数据类型一致才会显示
          return type === this.selectType;
        }
    }
  },
  filters:{
    formatDate(time){
        //time为rating.rateTime
        let  date = new Date(time); 
        //console.log(date)
        return formatDate(date, 'yyyy-MM-dd hh:mm');
    }
  }
    
}
</script>
<style lang="stylus" rel="stylesheet/stylus" scoped >
@import '../../common/stylus/mixin.styl'
.food
    position: fixed
    left: 0
    top: 0
    bottom: 48px
    z-index: 30
    width: 100%
    background: #fff
    transform: translate3d(0, 0, 0)
    &.move-enter-active, &.move-leave-active
        transition: all .2s linear
    &.move-enter, &.move-leave-active
        transform: translate3d(0, 100%, 0)	
    .image-header
        position: relative
        width: 100%
        height: 0
        padding-top: 100%
        img
            position: absolute
            top: 0
            left: 0
            width: 100%
            height: 100%
        .back
            position: absolute
            top: 10px
            right:10px
            .icon-close
                display: block
                padding: 6px
                font-size: 18px
                color:rgba(255, 255, 255, .8)
                background:rgba(0, 0, 0, .2)
                border-radius:100%
    .content
        position: relative
        padding: 18px
        .title
            line-height: 14px
            margin-bottom: 8px
            font-size: 14px
            font-weight: 700
            color: rgb(7, 17, 27)
        .detail
            margin-bottom: 18px
            line-height: 10px
            height: 10px
            font-size: 0
            .sell-count, .rating
                font-size: 10px
                color: rgb(147, 153, 159)
            .sell-count
                margin-right: 12px
        .price
            font-weight: 700
            line-height: 24px
            .now
                margin-right: 8px
                font-size: 14px
                color: rgb(240, 20, 20)
            .old
                text-decoration: line-through
                font-size: 10px
                color: rgb(147, 153, 159)
        .cartcontrol-wrapper
            position: absolute
            right: 12px
            bottom: 12px
        .buy
            position: absolute
            right: 18px
            bottom: 18px
            z-index: 10
            height: 24px
            line-height: 24px
            padding: 0 12px
            box-sizing: border-box
            border-radius: 12px
            font-size: 10px
            color: #fff
            background: rgb(0, 160, 220)
            opacity: 1
            &.fade-enter-active, &.fade-leave-active
                transition: all .2s
            &.fade-enter, &.fade-leave-active
                opacity: 0
    .info
        padding: 18px
        .title
            line-height: 14px
            margin-bottom: 6px
            font-size: 14px
            color: rga(7, 17, 27)
        .text
            line-height: 24px
            padding: 0 8px
            font-size: 12px
            color: rgb(77, 85, 93)
    .rating
        padding-top: 18px
        .title
            line-height: 14px
            margin-left: 18px
            font-size: 14px
            color: rga(7, 17, 27)
        .rating-wrapper
            padding: 0 18px
            .rating-item
                position: relative
                padding: 16px 0
                border-1px(rgba(7,17,27,.1))
                .user
                    position: absolute
                    right: 0
                    top: 16px
                    line-height: 12px
                    font-size: 0
                    .name
                        display: inline-block
                        margin-right: 6px
                        vertical-align: top
                        font-size: 10px
                        color: rgb(147, 153, 159)
                    .avatar
                        border-radius: 50%
                .time
                    margin-bottom: 5px
                    line-height: 12px
                    font-size: 10px
                    color: rgb(147, 153, 159)
                .text
                    line-height: 16px
                    font-size: 12px
                    color: rgb(7, 17, 27)
                    .icon-thumb_up, .icon-thumb_down
                        margin-right: 4px
                        line-height: 16px
                        font-size: 12px
                    .icon-thumb_up
                        color: rgb(0, 160, 220)
                    .icon-thumb_down
                        color: rgb(147, 153, 159)
            .on-rating
                padding: 16px 0
                font-size: 12px
                color: rgb(147, 153, 159)
</style>
